Changing-speed-transmission device.



P. & P. ROLANDO.

CHANGING SPEED TRANSMISSION DEVICE.

APPLICATION TILED JULY 25, 1910.

Patented Oct. 8, 1912.

2 SHEETS-SHEET 1 P. F. ROLANDO.

CHANGING SPEED TRANSMISSION DEVICE.

APPLICATION FILED JULY 25, 1910.

1,040,763. Patented 001;. s, 1912.

2 SHEETS-SHEET 2.

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PAUL ROLANDO AND FRANQOIS ROLANDO, OF PARIS, FRANCE.

CHANGING-SPEED-TRANSMSSION DEVICE.

Specification of Letters Patent.

llatentod Oct. S, 1912.

n Application filed July 25, 1910; Serial No. 573,756.

To all whom it may concern.'

Be 1t known that we, PAUL ROLANDO and FnANgoIs ROLANDO, both citizens of the Re public of France, and residing in Paris,.

reference to the annexed drawings in which Figure l is a longitudinal section of a form of construction of the new apparatus. Fig. 2 is a horizont-al section and Fig. 3 a cross section thereof.

Referring now to the drawing, the main parts forming the device are: a crank casing frame (o) in which is journaled the crank shaft (b), a crank connecting rod (c) connected to the cross head (d), two slides (e) (e) connected to a common shaft (f), two guides (g) (g) connected to a cylindrical horizontal rod extending through a hollow cylinder (i), a cylindrical vertical rod and a crank connecting rod (7c) the head (c) of which is located between both slides (c) (c) and through which passes the pin (f).

The crank shaft (o) rotating in the direction of the arrow is transmitting through the connecting rod (c), to the cross head (d) pivoted on two pins (Z) (Z) a recipro eating motion at a constant rate. The slides (e) (e) may be adjust-ed in any intermediate position between the pivoting shaft of the cross head and the point which is the utmost position which the slides may occupy with reference to the axis (m), Fig. l.

When the axis of the slides register with the oscillation axis, no motion is trans- Initted to the connecting rod (7c) and the latter is thus in the inoperative or dead point position, but when the slide axis oecupies the position (n), the connecting rod (le) is reciprocated to the widest ext-ent and at the highest speed. On moving the slides nearer to the axis of oscillation, the recipro eating motion of the connecting rod (7c) will thus decrease to zero, when their axis (f) will then register again with th, axis of oscillation (fm.) of the cross head (rl).

Since the `velocity of oscillation of the cross head (al) is constant, the connecting rod (Ze) will thus be reciprocated, during equal tinles, at a more or less higher velocity and to a larger or smaller extent according to whether its head be at a nearer or farther distance from the axis of oscillation. The converting of this reciprocating motion into a continuous rotary motion will be further described with reference to theuse of the device in inotor vehicles.

The position of the slides and consequently of the head of the connecting rod will be changed in the following manner: Supposing that the axis (f) of the slides and connecting rod head is registering with the axis of oscillation (fla) of the cross head (Il) and that the saine should be brought to the posi* tion shown in Fig. il.; the point (f) lnoving to (711,),the axis (o) will be at (0) and (p) at (p). By depressing the treadle (r) in the direction of the arrow, the slides and connect-ing rod head will then be brought toward the point (n) through the medium of the rod (j), the cylinder (fi) pivoted on the shaft (fi) (1?), and another rod (L) sliding freely in the aforesaid cylinder and the two guides (g) r/). rl`he connecting rod head being thus brought to the desired point is now held in the following manner: A double treadle (s) (s) is connected to the treadlc (1') by means of the pin (t). Such pin is threaded to the right on part of its length and to the left on the other part. Two jaws, of which one (u) is shown in Fig. l are screwed on this threaded pin, and are located'on either side of a guide (o) fixed to the crank casing (o). lVhen the slide has been brought to the desired point, by lneans of the treadle (7') it will be sutilcient to depress (.s") in the direction of the arrow to cause the rotation of the threaded pin (t), the rotation of this pin will result in the clamping of the guide (o) between both jaws and thus maintaining the connecting rod head at the desired point. For disengaging the latter it will be suilieient to depress in the direction of the arrow to cause the pin t) to rotate in the reverse direction and by this motion will cause the jaws to disengage the connecting rod which will then be returned by the spring (g) into the registering position with the axis of oscillation of the cross head.

The advantages resulting from the use of this device on motor-vehicles consist in the dispensing with 1, all friction or metallic engagement, 2, the changing speed gear casing, 3, the chain or shaft driving, 4, the epicycloidal differential gear. The doing away with all these various mechanisms secures the complete stability of the carriage. Further, by means of one treadle only the throwing in and out of gear and all the variations of speed are obtained.

Having now particularly described and ascertained the nature of our invention and in what manner the same is to be performed, we declare that what we claim is:

1. A change speed transmission device comprising in combination, a pivotally mounted transmission member, means oscillating said member about its pivot at a constant speed, a cross head slidable` on said member toward and away from the pivot thereof and provided with a connecting rod, and treadle mechanism having a telescoping connection with said member for moving said cross head, said telescoping connection being movable with said member, and a secy ond telescoping connection between said member and the remainder of said treadle mechanism.

2. A change speed mechanism device comprising in combination, a pivotally mounted transmission member, means oscillating said member about its pivot at a constant speed,

a cross head slidable on said member toward and away from the pivot thereof and provided with a connecting rod, an element slidable in said member and connected with said cross head, and treadle mechanism including a pivotal member having a telescoping connection with said element.

8. A change speed transmission device comprising in combination, a pivotally mounted transmission member, means oscillating said member, a cross head slidable on said member toward and away from the pivot thereof and provided with a connecting rod, a .connecting bar telescoping said member and connected wit-h said cross head to move the same toward and away from said pivot, a hollow pivoted element, a connection slidable in said element and pivoted to saidbar, and treadle mechanism for op erating said element, substantially as described.

In testimony whereof we affix our signatures.

PAUL ROLANDO. FRANQOIS ROLANDO. In the presence of- JEAN PIERRE PAKET, LAoRoIA CLAUDE JOSEPH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

